if haveAddr, ok := have[name]; ok {
			if haveAddr != wantAddr {
				t.Errorf("unexpected MAC address for %q - %v, want %v", name, haveAddr, wantAddr)
			}
			continue
		}
		// We could not find the interface in getmac output by name.
		// But sometimes getmac lists many interface names
		// for the same MAC address. If that is the case here,
		// and we can match at least one of those names,

// the ETag unmodified.
func Decrypt(key []byte, etag ETag) (ETag, error) {
	const HMACContext = "SSE-etag"

	if !etag.IsEncrypted() {
		return etag, nil
	}
	mac := hmac.New(sha256.New, key)
	mac.Write([]byte(HMACContext))
	decryptionKey := mac.Sum(nil)

	plaintext := make([]byte, 0, 16)
	etag, err := sio.DecryptBuffer(plaintext, etag, sio.Config{
		Key:          decryptionKey,
		CipherSuites: fips.DARECiphers(),

      return 0
    fi

    kube::log::status "No docker host is set."
    kube::log::status "It looks like you're running Mac OS X, but Docker for Mac cannot be found."
    kube::log::status "See: https://docs.docker.com/engine/installation/mac/ for installation instructions."
    return 1
  fi
}

function kube::build::is_osx() {
  [[ "$(uname)" == "Darwin" ]]
}

var preferredCiphers = []string{
	"******@****.***", gcm256CipherID,
	chacha20Poly1305ID,
	"aes128-ctr", "aes192-ctr", "aes256-ctr",
}

// supportedMACs specifies a default set of MAC algorithms in preference order.
// This is based on RFC 4253, section 6.4, but with hmac-md5 variants removed
// because they have reached the end of their useful life.

```

Chính là nó.

Những thứ đó là "type hints":

```Python hl_lines="1"
{!../../../docs_src/python_types/tutorial002.py!}
```

Đó không giống như khai báo những giá trị mặc định giống như:

```Python
    first_name="john", last_name="doe"
```

Nó là một thứ khác.

Chúng ta sử dụng dấu hai chấm (`:`), không phải dấu bằng (`=`).

        return System.getProperty("os.name").toLowerCase().contains("windows");
    }

    private static boolean isMacOS() {
        return System.getProperty("os.name").toLowerCase().contains("mac");
    }

    private static class ExecResult {
        private final String[] args;
        private final int code;
        private final String stdout;
        private final String stderr;

    }

    public static OperatingSystem forName(String os) {
        String osName = os.toLowerCase(Locale.ROOT);
        if (osName.contains("windows")) {
            return WINDOWS;
        } else if (osName.contains("mac os x") || osName.contains("darwin") || osName.contains("osx")) {
            return MAC_OS;
        } else if (osName.contains("sunos") || osName.contains("solaris")) {
            return SOLARIS;

	Fsid    Fsid
	Namelen uint32
	Frsize  uint32
	Flags   uint32
	Spare   [4]uint32
	_       [4]byte
}

type TpacketHdr struct {
	Status  uint64
	Len     uint32
	Snaplen uint32
	Mac     uint16
	Net     uint16
	Sec     uint32
	Usec    uint32
	_       [4]byte
}

const (
	SizeofTpacketHdr = 0x20
)

type RTCPLLInfo struct {
	Ctrl    int32
	Value   int32

	Ffree   uint64
	Fsid    Fsid
	Namelen int64
	Frsize  int64
	Flags   int64
	Spare   [4]int64
}

type TpacketHdr struct {
	Status  uint64
	Len     uint32
	Snaplen uint32
	Mac     uint16
	Net     uint16
	Sec     uint32
	Usec    uint32
	_       [4]byte
}

const (
	SizeofTpacketHdr = 0x20
)

type RTCPLLInfo struct {
	Ctrl    int32
	Value   int32

	Ffree   uint64
	Fsid    Fsid
	Namelen int64
	Frsize  int64
	Flags   int64
	Spare   [4]int64
}

type TpacketHdr struct {
	Status  uint64
	Len     uint32
	Snaplen uint32
	Mac     uint16
	Net     uint16
	Sec     uint32
	Usec    uint32
	_       [4]byte
}

const (
	SizeofTpacketHdr = 0x20
)

type RTCPLLInfo struct {
	Ctrl    int32
	Value   int32